Tuyere



June 1948.

M. DE LIN TUYERE Filed June 30, 1945 INVENTOR.

Patented June 29, 1948 ASTENT QFF'LCE whites 01. lines) This inventionrelates to improvements in eme ge .througl'i' which air is. supplied,tofuel gas it is-fed into afurnace.

Generally, air supplied through tuyeres into the ccrnbustionichainbersfurnaces .is dii'cfitfi radially toward or from the of the'tu'yereswhich causes movement of the burning gases to roll radially @in thecombustion chambers which more or less stifles the process ofcombustion.

In the instant inventionanpbie ct isflto supply it a proper amount ofair under pressure distributed uniformly about'the perimeter .of .thefuel body in suchrnanner as to causethename of the burning "fuel .toswirl uniformly in the combustion chambercontinuously in a'definit'edirectio thus obviate-formation of eddi es, or other limped-.ances to combustion of the fuel gases.

Another object of the inventicnis to construct a tuyre .made up of aseriesidf'units tele copi- .jcally'arranged to forni acontinuousfl c'mplete "errant, and shaped so as to provide a corresponding series ofoutlet air passageways directed generally around a circuit so that air,introduced into the combustion chamber of the furnace, swirls uniformlytherein about a common axial center, thus to avoid conflicting movementsof fuel gases during combustion thereof.

And a still further object of the invention is to provide a tuyerethrough which fuel and air are supplied to the combustion chamber of afurnace so as to insure uniformity in themovement and density of thefuel gases during passage thereof through the combustion chamber.

Other objects and advantages of the invention appear in the followingdescription.

An illustrative embodiment of the invention is shown in the accompanyingdrawings, in which- Fig. 1 is a fragmentary top plan view of a structurein which the invention is incorporated showing a series of tuyre unitstelescopically arranged in operative position;

Fig. 2 is a rear endelevational view of one of the tuyere units;

Fig. 3 is a front end elevational view of a similar tuyere unit;

Fig. 4 is a fragmentary elevational view showing two of thetelescopically arranged units, the section being along a verticalconcentric plane located substantially midway between the inner andouter walls of the series of tuyere units, as indicated by the dottedline x-x of Fig. 1;

Fig. 5 is an elevational view showing a section of the tuyre structureon the line y-y of Fig. 1; and

Fig. 6 is a schematic diagrammatical top plan 2 view ofthe ,tuyere.structirr egrranged connec- .tion matt we and ensures mea s, .d aWn toareduceds le. The iillustrativ .e consists of ai uye pf similar tayere.rang'edin l f e basafl Each tuyije Qunit "co s ts of an archishapedhollow casting the 'fr'on'tend of ai 'ged to form a bonnet. 9,tand therear end, the casting is of lesser diminsion's so as to'be receivedtelescopically within'kthe bonnet of the next a'djacent tuyere ,unit.'Theekte'rior lateraljwalls of the rear end portion of each unit haveout- .wardly extending flanks ID and ii that snugly lit against thecorresponding interior' walls of the bonnet of'an adjacent unit; 'fIfheflanks have lateral 'outwardlyIe tending projectionsllfl irespectively.qnv their'lower portions at points spaced from. the .rearend of thefuriit that, serve as stops by which is'liniited' theprojection of the rear end of one unit into the bonnet of an adjacentunit by having contact with the outer face thereof, so that when theunits are telescopically assembled there is left between the bonnet ofeach unit and the rear end of the adjacent unit an open space I2 betweenthe opposing walls of imam o the nvent i .Wh c se i the telescopedportions of the units, constituting an air passageway for the outlet ofair.

These passageways ,extend continuously from the flanks l0, over thecrests of the telescoped portions of the units and down to the flanks Hwhere they terminate. In this manner there is established an annularseries of air outlet passageways uniformly spaced around the crest ofthe annulus formed of the units. As the tops of the flanks [0 on theinner walls of the units terminate at a lower level than that of thetops of the flanks H on the outer walls thereof, the preponderance ofair emitted through the passageways is in the region bordering the innerwall of the annulus, while a minor portion is along the crest andadjacent upper portion of the outer wall thereof.

The tuyere units are assembled in position upon the base 8 whichconsists of an annular air duct I3 the upper wall M of which has madetherein an annular series of openings l5, and has a corresponding seriesof radial arms l6 that intervene therebetween. Each unit 1 has aninterior crosspiece I! that overlies the corresponding arm I6 of thebase, when the unit is in place, where it is held by a bolt l8 thatconnects the arm and cross-piece. The bottoms of the tuyre units areopen to receive air from the duct through the openings 15.

The air duct I3 is connected with a suitable source of air underpressure (not shown), by means of a conduit [9 as in the usual practice,and a fire pot 2 is arranged concentrically with and encompassed by theair duct as in the usual manner. The fire pot is supplied with fuel froma suitable source (not shown) through a feed pipe 2| having therein acommon conveyer screw 22.

Operation In using the invention, fuel is supplied through the feed pipe21 to the fire pot continuously or periodically with more or lessregularity, and air is likewise supplied to the air duct l3 through theconduit 19 by means of any suitable stoking apparatus (not shown) forsuch purpose. While the fuel is fed into the fire pot, air from the airduct is emitted through the outlet passageways l 2 in a common directionaround the crest of the annulus so the body of fuel in the fire pot iscompletely encompassed by a swirling stream of air by which isstimulated combustion of the fuel body With uniformity. This action isadvantageous and of value as the flame, due to combustion, is circulatedevenly and entirely around the circumferential region of the fuel bodywith consequent uniformity and thoroughness of combustion thereof.

Variations from the particular construction above disclosed may beresorted to by the exercise of skill in the art, without departure fromthe spirit or scope of the invention.

What I claim is:

1. A tuyre structure consisting of a hollow annulus formed of a seriesof telescopically arranged units, one end of each unit having a bonnetandits opposite end portion being adapted to enter the bonnet of anadjacent unit, the outer and inner exterior walls thereof having alaterally projecting flank extending upward part way toward the crest ofthe unit adapted to fit against the corresponding inner wall of thebonnet so there is left a space between the crest of said end portionand the opposing inner face of said bonnet to form an air passagewaythat extends from one flank, over the crest of said end portion, to' thecorresponding opposite flank, and a stop on each flank adapted to limitprojection of said end portion into the corresponding bonnet by havingcontact therewith.

2. A tuyre structure consisting of a hollow annulus formed of a seriesof telescopically arranged units, one end of each unit having a bonnetand its opposite end portion being adapted to enter the bonnet of anadjacent unit, the outer and inner exterior walls thereof having alaterally projecting flank extending upward part way toward the crest ofthe unit adapted to fit against the corresponding inner wall of thebonnet so there is left a space between the crest of said end portionand the opposing inner face of said bonnet to form an air passagewa thatextends from one flank, over the crest of said end portion, to thecorresponding'flank.

MARTIN DE LIN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,068,018 Goetz Jan. 19, 19372,112,420 Lunda Mar. 29, 1938 2,171,958 Zehrbach Sept. 5, 1939 2,214,495Yates Sept. 10, 1940 2,231,987 Carter Feb. 18, 1941 2,361,883 SnyderOct. 31, 1944 2,400,900 Agriola May 28, 1946

